brain damage has left him 100% disabled according to the government. >> like, i know the word but i cannot say it. and things like that, that happens to me everyday and it gets me mad. >> reporter: what you're doing, would it hold any hope for rigo saenz? >> we can't make rigo saenz better if we don't know what's contributing to his problems, what is making him disabled. if we can understand those little changes that lead to problems then we can interrupt them, we can intercept them with different therapeutic agents. >> reporter: the big hope here is for researchers to find a way to identify c.t.e. in those who are still alive. right now the only way to diagnosis it, scott, is to examine the brain issue of those who've already died. >> pelley: fascinating, jim, thank you very much. in washington today, the republicans responded to the white house budget plan with a proposal of their own. it would raise the eligibility age for medicare and people on social security would get smaller cost of living increases. unless there's a compromise by the end of this month, taxes will go up automaticall